Leach Field Repair & Replacement
When a septic system fails, you need a licensed, transparent partner who protects your yard and handles the process end‑to‑end. GWM Earthworks is a NH Licensed Septic System Installer with 25 years of local experience. We diagnose the true problem, coordinate design and permitting, install to code, and restore your site—so you can get life back to normal with minimal disruption.
What We Do & Key Benefits
Thorough diagnostics
Licensed septic repairs and full replacements. We coordinate with permitted designers (test pits/perc), handle town/NHDES submissions, install to spec, and restore the site.
Design coordination
Work with a permitted septic system designer for test pits/perc tests and a compliant plan tailored to your soils, slope, and setbacks.
Installation done right
Replace the field (and tank if required), repair/replace D‑box and crushed pipes, add effluent filters where appropriate, and protect utilities
Minimal yard disruption
Thoughtful access routes, erosion control, and neat staging. We finish with grading and loam/seed as scoped.
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Understanding the Process
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Site Visit & Assessment
We locate system components, document symptoms, and discuss immediate steps (e.g., pump‑out). You’ll get a straightforward plan and a preliminary estimate.
Design & Permitting
A licensed designer completes test pits/perc tests and prepares the plan. We submit to the town and NHDES, monitor approvals, and schedule work once permits are in hand.
Installation & Inspections
We replace the leach field (and related components), coordinate inspections before backfill, and keep the site safe and orderly throughout
Restoration & Closeout
Final grading and restoration per scope, plus as‑built documentation as required. We review care tips and answer any remaining questions.
Leach Field Projects & Site Restoration Results
Leach Field FAQs
What are the warning signs of failure?
Odors near the tank or field, slow drains or backups inside, and persistently wet or unusually green strips over the drainfield are common flags. Sometimes the issue is localized—a crushed pipe or failed baffle—so we start with a site visit to determine whether you need a full replacement or a targeted repair.
Can you repair instead of replace?
Sometimes. If we find a damaged baffle or crushed line, we may be able to perform a targeted repair without a full redesign or permit cycle. When a field has reached end of life or is out of compliance, a licensed designer will determine the appropriate replacement plan based on soils, setbacks, and groundwater.
How long does the process take?
Plan on several weeks. Design and permitting typically take about 3–4+ weeks before any excavation can begin, depending on designer schedules and town/state approvals. Once permitted, installation commonly takes 3–5+ days, followed by restoration. We’ll give you a realistic schedule for your specific site.
What will it cost?
Costs vary by design type, access, ledge/rock, and groundwater. Full replacements in NH often range from the low‑five to mid‑five figures, while targeted repairs (like a crushed pipe) are much less. After assessment, we provide a transparent, line‑item estimate so you understand each cost driver.
How disruptive is the work to my yard?
We plan access to minimize disturbance, protect utilities, use erosion controls, and keep staging organized. After inspections and backfill, we regrade and restore per scope (often loam/seed). Expect some settling as soils stabilize; we’ll advise care and touch‑up needs.
Do you handle permits and inspections?
Yes. We coordinate with a licensed designer, submit plans to the town and NHDES, schedule inspections, and provide required as‑builts. You’ll have a single point of contact from start to finish.
Request a Leach Field Estimate
Have warning signs or a failed inspection? Share a brief description and optional photos with our Get a Quote form. We’ll respond within 24 hours to schedule your site visit and outline next steps.